<template>
  <div>
        <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
          <!-- 展开列  -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id" >
                 <!-- 渲染一级权限 -->
                 <el-col :span="5">
                   <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                   <i class="el-icon-caret-right"></i>
                 </el-col>
                 <!-- 渲染二级和三级权限 -->
                 <el-col :span="19">
                   <!-- 通过for循环嵌套渲染二级权限 -->
                   <el-row :class="[i2 == 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                     <el-col :span="6">
                       <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                       <i class="el-icon-caret-right"></i>
                     </el-col>
                                                     <!-- i3 -->
                     <el-col :span="18">
                       <el-tag type="warning" v-for="(item3,) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                         {{item3.authName}}
                       </el-tag>
                     </el-col>
                   </el-row>
                 </el-col>
              </el-row>
              <!-- <pre>
              {{scope.row}}
              </pre> -->
            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
<el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
default-expand-all :default-checked-keys="defKeys" ref="treeRef"
></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的树形绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前分配权限的角色Id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.console.error('获取角色列表失败')
      }

      this.rolelist = res.data

      console.log(this.rolelist)
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await
      this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }

      // 把获取到的权限数据保存data中
      this.rightslist = res.data
      console.log(this.rightslist)

      // 递归获取三级节点的Id
      this.getLeafkeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式,获取角色下所有三级权限的id,并保存到defkey数组中
    getLeafkeys(node, arr) {
      // 如果当前 node 节点不包含children 属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafkeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }

      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less">

.el-tag {
  margin: 7px
}
.bdtop {
  border-top: 1px solid #eee
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items:center;
}
</style>
